Hydrological Parameters Measuring and Gas Fluxes Quantification of Shallow Gas Seepage at Cape Fiolent

Complex measurements of hydrological parameters and gas fluxes at the new methane seep recently discovered at Cape Fiolent (Crimean coast) were carried out. A lower values of water temperature T and concentration of dissolved oxygen O2 outer of the seepage area in comparison with the values above the gas point were registered. Episodes of an abrupt T and O2 increase with a subsequent decrease were noted. The estimation of the bubble gas fluxes was made by two different methods: video registration and trap method. The estimated flux was about 60 and 22.5 L/day out of entire seepage area respectively. High CH4 concentrations in sea-surface water above seep points were measured.